.list-sort-doc{
  padding: 20px;
  position: relative;
  .center-example{
    position: relative;
    margin-left: calc(50% - 100px);
    .center-item{
      height: 38px;
      width: 200px;
      border-radius: 5px;
      text-align: center;
      line-height: 38px;
      border: 1px solid #e9e9e9;
      box-sizing: border-box;
      margin-bottom: 2px;
      background: white;
    }
  }
  .h1-example{
    position: relative;
    margin-left: calc(50% - 200px);
    .h1-item{
      width: 400px;
      margin-bottom: 0;
    }
  }
}
